Speed Date has filed a $5.65 million lawsuit against online dating giants Match.com.
They claim Match broke off a two-year contract 12 months early, which led to the cancellation of 86 events.
The suit also accuses Match of cancelling the contract as soon as they learnt of certain Speed Date trade secrets, in order to run their own events.
Speed Date are asking for $1.65m for loss of revenue, and $4m for the misappropriation of trade secrets.
The complaint says that the original agreement, made last December, stated that Speed Date would manage and operate speed-dating events for Match.
In return Match would pay Speed Date $25 per ticket sold and a further $25 for each person in excess of the minimum of 20 tickets.
The $5.65m lawsuit was filed in Pennsylvania federal court, and combines the two alleged misdemeanours, both of which Speed Date say breach the terms of the contract.